How can I boost my resume?

Do colleges only look at school-related extracurricular activities or do they also care about activities you pursue on your own? I'm not very athletic, but I want my college resume to be perfect. I was considering taking a class like karate, or something I don't have to try out for.

Colleges are interested in any sort of activity you devote a significant amount of time and energy to. Don't feel pressure to be class president, captain of the debate team, or a star athlete just because those are the most obvious types of leadership. It's more important to do what you love and explore leadership positions within your areas of interest.

Admissions officers are looking for evidence of your real passions so they can figure out how you might get involved on their campus. That means you need to demonstrate your impact and commitment over a length of time to a particular club, activity, or hobby whether it be skateboarding, kickboxing, slam poetry, fashion designing, or guerilla filmmaking. Just make sure that your college application explains what you do, why you enjoy it, and how you've impacted others through your involvement. If you love what you do, that enthusiasm will transfer to your application and get colleges excited about having you participate in their campus activities.